$OpenBSD: patch-error_c,v 1.1 2014/11/27 03:19:18 brad Exp $

For exit() declaration.

--- error.c.orig	Thu Nov 20 01:35:06 2014
+++ error.c	Thu Nov 20 01:35:16 2014
@@ -1,5 +1,6 @@
 /* Copyright (c) 1994 David Hogan, see README for licence details */
 #include <stdio.h>
+#include <stdlib.h>
 #include <X11/X.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
